squillion

plural squillions

1. slangA very large, unspecified number

   I just ran the numbers and got 1.7 squillion, myself.

   2004 May 8, Noelle S. Alito, “Re: Entropy”, in talk.origins (Usenet)

   3 more examples

   The word million was adequate for most things, billion came in handy on occasions, but if you wanted to use a word for a very, very large number, you just had to invent one. Anna invented one: a squillion.

   1974, Fynn, Mister God, This Is Anna, Ballantine Books (2000), pages 102-103

   You thinks to yourself, ‘There’s a billion, trillion squillion of them, no one’s going to notice.’ But that’s where professionalism comes in, sort of thing.

   1990, Terry Pratchett, Eric, page 138

   It'll just take a squillion times longer than the age of the universe to happen.

   2004 May 7, Xaonon, “Re: Entropy”, in talk.origins (Usenet)

   Antonyms: bupkis, zip, zilch, nada